32、China's population is expected to increase to about 1.5 billion in 2040, ________it will start to decline slowly.

     A. where              B. after which              C. on which                 D. which

31、The traffic problems we are looking forward to seeing _____ should have attracted the government's attention.

A. solving             B. solve                       C. to solve                   D. solved

30、Professor Wooden makes roughly $1,000 every week, and 60 percent of _________ is spent on books

     A. which              B. them                       C. it                                   D. what

29、Try recording your voice in English--this may help you to see_____________ you could improve.

     A. that                  B. where                      C. how                        D. when

28、―― You can take a walk daily if you want to keep healthy.

―― ____________.

     A. Yes, that's enough                           B. Thanks for your advice

     C. I like surfing the Internet                 D. Well, that's OK

27、My camera can be _____ to take pictures in cloudy or sunny conditions.
      A. treated             B. adopted                   C. adjusted                  D. remeded

26、

―― I have been ________ a lot of pressures at work lately.

―― I am ________ your service if necessary.

A under; at           B in; at                        C on; for                     D in; to

25、On National holidays, many amusement parks offered p____________ prices to attract visitors.

二、选择题

（每空？ 分，共？ 分）

24、How do you a____________ for your absence from the class last Thursday?

23、The increasingly serious pollution contributes to people p___________ for the use of alternative energy sources.